Question

A school provides milk to the students daily in a cylindrical glasses of diameter 7cm. If the glass is filled with milk up to height 12cm find how many litres of milk is needed to serve 1500 students

Answer 1

hiii!!!

here's ur answer...

given the diameter of the cylindrical glass is 7cm.

therefore radius of the glass = 7/2cm

height of the milk in the glass = 12cm

volume of the milk in the glass = πr²h

= 22/7 × 7/2 × 7/2 × 12

= 11 × 7 × 6

= 462cm³

volume of milk for 1500 students = 462 × 1500

= 693000cm³

we know that 1000cm³ = 1 litre

therefore 693000cm³ = 693000/1000

= 693 litres

hence, 693 litres is required to serve 1500 students.

hope this helps...!!

Answer 2

Hi there !!
Here your answer :

Given,
diameter of the cylinder glass = 7cm
Radius = diameter/2 = 7/2cm

Height = 7cm

Volume of milk in the glass = volume of cylinder = πr²h

$= \frac{22}{7} \times \frac{7}{2} \times \frac{7}{2} \times 12cm$
= 462 cm³


Volume of milk need for 1500 students

Volume = 1500 × 462cm³

Volume = 693000cm³

We know ,

1000cm³ = 1 Litre
Therefore,

693000 cm³ = 693000/1000 Litres

= 693 Litres


Thus,
the volume of milk required for 1500 students is 693 Litres